CVE-2021-45738

Name: CVE-2021-45738
Creator: NVD / NIST
Published: 2022-02-04T02:15:08.29+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.43%

Last modified Jun 17, 2026

CVE-2021-45738 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. TOTOLINK X5000R v9.1.0u.6118_B20201102 was discovered to contain a command injection vulnerability in the function UploadFirmwareFile. This vulnerability allows attackers to execute arbitrary commands via the parameter FileName.. EPSS estimates a 4.43% chance of exploitation in the next 30 days.

Description

TOTOLINK X5000R v9.1.0u.6118_B20201102 was discovered to contain a command injection vulnerability in the function UploadFirmwareFile. This vulnerability allows attackers to execute arbitrary commands via the parameter FileName.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

4.43%

90.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-77

Affected Software

Vendor	Product	Versions
Totolink	X5000r Firmware	9.1.0u.6118_b20201102

References

https://github.com/pjqwudi/my_vuln/blob/main/totolink/vuln_8/8.mdExploit, Third Party Advisory
https://github.com/pjqwudi/my_vuln/blob/main/totolink/vuln_8/8.mdExploit, Third Party Advisory

Timeline

Published: Feb 4, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45738?

How severe is CVE-2021-45738?

CVE-2021-45738 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.43% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45738?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-45738?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST